Angle attachment for dental engines



(No Model.)

s. P. SHARP. ANGLE ATTACHMENT FOR DENTAL ENGINES No. 491,499.

Patented Feb. 7, 1893.

IN VE N TOR QQVZWW ATTORNEYS.

Min STATES PATENT OFFICE.

SAMUEL P. SHARP, OF KNOXVILLE, TENNESSEE.

ANGLE ATTACHMENT FOR DENTAL. ENGINES.

SPECIFICATION forming part of Letters Patent No. 491,499, dated February'7, 1893.

Application filed July 26, 1892.

To all whom it may concern: 7

Be it known that I, SAMUEL P. SHARP, of Knoxville, in the county of Knoxand State of'Tennessee, have invented a new and Improved AngleAttachment for Dental Engines, of which the following is aspecification, reference being had to the annexed drawings, forming apart thereof, in which Figure 1 is a side elevation of my improved angleattachment, showing its connection with the engine tool handle; Fig. 2is a side elevation, partly in section, of the attachment; 3 is atransverse section taken on line 33 in Fig. 2; Fig. 4 is a detail viewof the bit-locking spring; and Fig.5 is an enlarged perspective view ofone of the bits or burrs.

Similar letters of reference indicate corresponding parts in all theviews.

The invention is an improvement in the class of angled tool-holders fordental en gin es, and consists in the construction and combination ofparts as hereinafter pointed out.

The handle A, is of the kind usually employed in connection with dentalengines for carrying the burring, drilling, abrading and polishingtools. It is provided with a shaft of the usual description furnished atits extremity with a socket for receiving rotating tools. To the shaftis fitted the spindle B, which takes the place of the ordinary revolvingtool.

A frame 0, consisting of the body a and the angled arms b, b, isattached to the side of the handleA at the end, and the outer end of thespindle B is journaled in the arm I), and carries on the end thereofwhich projects through the said arm, a beveled gear Wheel 0. In the arms5, b, is journaled a sleeve d, which is inclined at any angle with thespindle B which may be found most convenient and desirable. In thepresent case the axis of the sleeve disinclined at an angle of aboutsixty degrees with the spindle B. The sleeve d carries a beveled gearwheel 0, which meshes with the wheel 0, and it is provided with atransverse pin e which engages the tool carried by the sleeve, causingit to rotate in the Serial No. 441,278. (No model.)

sleeve. To the side of the body a is attached a flat spring f, providedwith an angled slotted end g, which extends into a slot h in the arm I).

The tool D, which is carried by the sleeve d, is flattened upon one sidethrough a portion of its length to allow it to engage the pin eextending through the sleeve (1, and in the shank of the tool are formedcircumferential grooves t, i, into which the slotted end of the spring fenters. The said spring by engagement with the circumferential grooveretains the tool D in the sleeve d. The tool D is reversible, and maybeinserted in either end of the sleeve. When it is in the position shownin full lines in Figs. 1 and 2, the tool forms an obtuse angle with thespindle B, but when it is inserted in the opposite end of the sleeve, asindicated in dotted lines in Fig. 2, the tool D forms an acute anglewith the spindle B.

My improved attachment may be applied to any existing formof dentalengines, or it may be provided with a handle of its own especiallyadapted to it.

- Having thus described my invention, I claim as new, and desire tosecure by Letters Patent,-

1. In an angle attachment for dental engines, the combination, with theangle frame 0 having the arm I) provided with the slot h, of the flatspring f, having its free end forked, and adapted to enter said slot,whereby it is adapted to hold the tool detachably in place, as shown anddescribed.

2. In an angle attachment, the combination with the angle frame C havingthe apertured arms I) b one of which has a slot h, and the cross pin 6,of the reversible tool D having two circumferential grooves 11 and t"and a flattened side portion, and the forked spring f which is adaptedto enter said slot and thus engage either groove and lock the tool ineither position, as shown and described.

SAMUEL P. SHARP.

\Vitnesses:

H. H. TAYLOR, (J. H. BROWN.

